Machine for forging bolt-blanks



2 Sheets-Sheet 1.

(N0 ModeL) H. J. JOHNSON.

MACHINE FOR FORGING BOLT BLANKs.

N niu IN ENTOR Patented Nov. 24, 1885.

. ITNE 5E5- (No Model.) 2 Shets-Sheet 2.

H. J. JOHNSON.

MACHINE FOR FORGING BOLT BLANKS. No. 330,901. Patented Nov. 24, 1886.

WITNESSES- IINTTED STATES PATENT HENRY JAMES JOHNSON, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO PLUMB, BURDIOT & BARNARD, OF BUFFALO, NEW YORK.

MACHINE FOR FORGING BO-LT-BLANKS.

SPECIFICATION forming part of Letters Patent No. 330,901, dated November 24, 1885.

Application filed July 12, 1884. Renewed July 22, 1885. Serial No. 172,345.

To all whom i2; may concern:

Be it known that I, HENRY JAMES J OHN- SON, of the city and'county of Providence and State of Rhode Island, have made an inven- 5 tion of certain new and useful Improvements in Machines for Forging Bolt-Blanks, the Bars of Monkeyrenches, and Similar Articles; and I do hereby declare that the following, in connection with the accompanying drawings,

is a full, clear, and exact description andspecification of the same.

This invention has reference to the forging of heads upon blanks by the operation of two upsetting heading-tools acting in combina- I 5 tion withlateral forging-dies, and its object is to enable the attendant to control the shifting of the heading-tools while the machine is in operation, so that as many blows may be struck by the finishing heading-tool as the attendant deems expedient, and that the first blow will be struck by the first heading or upsetting tool.

The invention consists of certain combinations of mechanical devices, which are recited 2 in detail at the close of this specification.

In order that my improvements may be fully understood, I have represented in the accompanying drawings and Will proceed to describe parts of a machine in Which I have embodied them in the best manner at present known to me.

Figure 1 represents a side view of certain parts of the machine, the residue being removed to enable the construction to be more 3 5 readily understood. Figs. 2 to 7, inclusive,

represent parts of the machine designated by the same letters as the same parts are in Fig 1.

The machine of which the devices represented in the above-mentioned drawings .are 0 parts is constructed in other respects sub stantially as described and represented in the patent granted to Orrin Olark Burdict the 28th day of September, A. D. 1875, No. 168,135. With the machine of that patent .the heads are forged upon stems or blanks by the operation of a reciprocating heading-tool and lateral forging-tools, to which the blank is presented by means of a blank-carriage. In that machine there is but one heading-tool, which 50 is moved by a reciprocating piston.

(No model.)

The piston D, which I have represented in my drawings, corresponds with the piston of the said Burdict patent; but instead of the said piston carrying and operating a single heading-tool, (as it does in said Burdict patent machine,) it carries two, E E. The first of these heading-tools has a socket in it, and it is used to make the first blow upon the blank and to upset the metal and form a crude conoidal or pyramidal head ready for the subse- 6o quent work of the finishing heading-tool and lateral forging-dies. The second heading-tool,

E, is used to finish the head upset by the action of the first heading-tool, E. In the present example the two heading-tools are of the form required to forge the heads of machine-bolts from blanks of the size of their round stems. When the machine is used for other articles, the forms of the heading-tools must be suited to the article to be forged, as is well understood by the users of such machines. The said two headingtools are both secured to a shifting tool-holder, A, which in this case is fitted to turn upon trunnions, by which it is connected with the reciprocating piston D, thesaid 7 5 trunnions passing through ears or checks, which protrude at the sides of the piston, and the shifting tool-holder is turned upon the axis of its trunnions to place one or the other heading-tool in its position for operating upon the blank to be forged.

The blank'carriage which is used in the machine is constructed and operated as described in the said Burdict patent, N being the rockshaft, which is turned to advance and withdraw the blank-carriage. T is the hand-lever by which the carriage may be moved by hand, and O is the vibrating frame, which is used to operate the rock-shaft N by the drivingshaft F of the machine, so that the carriage may be moved by power, the said frame 0 being connected by a rod, t, with a crank-pin, S, secured to the driving-shaft of the machine. The vibrating frame is caused to vibrate continually by the revolution of the driving-shaft, and it is fitted with a doubleheaded pawl, w, turning upon a pivot in the frame, and fitted to engage with either of two teeth, 12 1), formed upon the hub T, secured to the rock-shaft. When the pawl is turned by IOO hand so as to engage with the tooth o, the movement of the pawl by the crank-pin S and vibrating frame 0 turns the carriage rockshaft N to advance the blank-carriage, and when the pawl is turned so as to engage with the other tooth, o, the movement of the pawl turns the rock-shaft backward to withdraw the blank-carriage. The pawl w is held in its mean position without engagement with either tooth by a spring, as described in said Burdict patent, and a starting-handle, M, is provided to turn the pawl in either direction, so that the carriage may be either advanced or withdrawn, as required by the attendant, and when in either position may be left there by letting go the starting-handle, which permits the pawl-spring to restore it to its mean inactive position. The crank-pin S is so set relatively to the cranked part of the drivingshaft which operates the piston D and its heading-tools that the advance of the blankcarriage takes place while the heading-piston 1) is being drawn back from the blank, so that the heading-tool does not-obstruct the pre sentation of the blank by the blank-carriage.

The shifting of the heading-tools E E is effected by power, but is determined by the attendant, and in this example simultaneously with the advance and withdrawal of the boltcarriage. To these ends one of the trunnions of the tool-holder A has a crank, a, secured to it, which is connected by a link,c', with the pin of a crank, O, that -projects from a rocking-sleeve, cflwhich is fitted to rock upon an extension of the link -pin G of reciprocating pistonv D.

This rocking sleeve 0 is fitted with a beveled pinion, L,whose teeth engage with those of a beveled segment, L, whose tubular hub Z is compelled to slide upon a rock-shai't,Z, by the action of a fork, Z that is engaged in a groove of the sleeve; but the sledve is compelled to rock with the rock-shaft Z by means of two splines, m,which are fixed to the shaft and fit loose in grooves in the bore of the tubular segment-hub Z. One end of the rock-shaft Z is fitted with a disk, M, from which two pins, n n, project, so that the rock-shaft Z and rock ing sleeve 0 may be turned in one direction by pulling one of the pins, a, downward, and may be turned in the reverse direction by pulling't-he other pin,n, downward. When the pin n is pulled downward,the turning of the rock- .ing sleeve 0 and its crank G compels the linkrod 0 and the shifting tool-holder A to take the positions shown in Fig. 1, with the first heading-tool in its position for operating upon the blank, and when the other pin,n,is pulled downward the turning of the rocking sleeve c and its crank in the reverse direction compels the link-rod and the shifting tool-holder A to take the positions shown in Fig. 2, with the finishing heading-tool in its position for operating upon the blank.

In order that the rapid movement of the parts may not throw the sleeve-crank 0 too far in either direction, a stop, 0, is secured to the piston D in such a position relatively to two seats, 0 0 formed upon the link-rod c,

that excessive movement of that rod in either direction is prevented by said stop.

In order that either of the pins n n of the rocking sleeve may be pulled downward, the

shifting hook P is provided. It consists of a hook which is connected pivotally to a hookstock, P, by means of the pivotal box 19. This stock is connected by a pivot with one arm of an elbow-lever, P whose other arm is connected bya link,p, with the crank-pin S of the driving-shaft. Hence as the driving-shaft revolves the shifting hook P is causedto move up and down. The hook-stock P is guided by a radius-bar one of whose ends is pivoted to the hook-stock and the other to the frame of the machine.

The pivoting of the shifting hook P to its hookstock P by the pivotal box 1) enables it to be moved laterally to engage with one or the other of the pins 11 a of the rocking sleeve, as required. the pivotal box bya'pivot,p",so that the hookmay be forced toward the pins n a, or withdrawn from them. A spring, 1), .is provided The hook is also connected with to withdraw the hook from the pins n n, and I engage with the pins n a when the piston D of the heading-tools is being retrograded.

By reason of the above-described connec tions between the shifting tool-stock P and the driving-shaft F the rocking sleeve 0 may be turned in one direction or the other, to shift the heading-tools according as the shifting-hook P is placed in position to draw down one or the other of the pins'n n of the rock-shaft of the said rocking sleeve; and the machine-is so constructed that the placing of the hook P in one or other position, and consequently the shifting of the heading-tools, is determined by the attendant. For this purpose the shank of the hookbelow its pivot is fitted in a slide, R, which is arranged 'to slide crosswise in the hook-stock P, and the slide-is slotted to receive a cam-block, R, having an inclined slot which receives in it a pin, r, secured to the slide B, so that the movement of this cam-block R endwise in one direction or the other shifts the hook laterally and places shifting-hook P may be controlled by the hand-lever T and by the starting-handleM, either of which may be operated by the attendant.

When the bolt-carriage is in its withdrawn position for receiving a bolt-blank, the parts of the machine occupy the several positions represented at Fig. 1, with the first headingtool, E, in the position to operate. When a bolt-blank has been introduced into the boltcarriage, and either the hand-lever T or the starting-handle M is operated to advance the bolt-carriage, the same act forces the arm T against the horn s of the crutch R rocks it, moves the cam-block R, and places the hook Platerally in the position to operate upon the pin n, through which the rocking sleeve 0 may be turned; but as there is a large amount of play between the end of the arm T and the horn s of the rocking crutch R and as the cam P does not bear the hook toward the pin until the heading-piston D and its headingtools E E are being withdrawn, the hook P does not pull down the pinion n and shift the shifting tool-holder A until the first headingtool, E, has acted upon the blank in the blankcarriage and has upset its end to form a crude head. During the following retrograde movement of the heading-piston the hook P acts upon the pin a, thereby turning the rocking sleeve 0 shifting the shifting tool-holder Ato the position shown at Fig. 2, and placing the second or finishing heading-tool, E, in the position to act upon the head of the blank. The shifting tool-holder remains in this position until the attendant finds the head of the blank is forged, when he withdraws the bolt-carriage either by the hand-lever T or by operating the starting-handle M. The turning of the carriage rock-shaft N for the withdrawal of the bolt carriage causes the arm T to bear against the other horn, s, of the rocking crutch R thereby restoring the cam-block R to the position shown in Fig. 1, and placing the hook P laterally in the position to act upon the pin a, so that the first revolution of the driving-shaft F after the withdrawal of the bolt-carriage causes the hook P to turn the rocking sleeve and the shifting tool-holder, and to place the first heading-tool in position to operate upon the next blank which is subjected to the opera tion of the machine. In order that the rocking clutch B may not be over vibrated in either direction, a fixed segment, S, is provided, to meet shoulders 50 00 of the crutch-hub and act as a stop in each direction when the rocking crutch has been rocked to the required extent to shift the shifting tool-holder. The crutchhorn s also is extended in the arc of a circle, so that the end of the arm T can bear upon it and lock the crutch in its position, thereby preventing for the time the shifting of the shifting tool-holder and its heading-tools.

By reason of the combination of the shifting tool-holder A with the hand-lever T and starting-handle M through the intervention of the devices above described, the attendant is able to control the shifting of the heading-tools E E and to cause as many finishing blows to be struck by the finishing heading tool E as he may deem necessary, while the first blow is always struck by the first heading-tool, E. In the above machine the link 0', beveled pinion L, rocking sleeve 0 segment L, rock-shaft Z, pins a n, shifting hook P, cam P and crank-pin S, with their connections, constitute the shifting devices for shifting the position of the shifting tool-holder A, and the handlever T and starting-handle M constitute the controlling devices by which the attendant can control the operation of the heading-tools E E, carried by the shifting tool-holder A.

The shifting devices may be varied as circumstances render expedient, their function being to transmit motion from the main driving-shaft F to the shifting tool-holder A and to effect its movement in one direction or the othcr,as determined by the movement of either the hand-lever T or the starting-handle M by the attendant of the machine.

I claim as my invention 1. The combination, substantially as before set forth, of the shifting tool-holder, the piston which carries it, the main driving-shaft, the shifting devices, and the hand-lever which is adapted to be operated by the attendant.

2. The combination, substantially as before set forth, of the shifting tool-holder, the piston which carries it, the main driving-shaft, the shifting devices, and the starting-handle whereby the shifting of the shiftingtool-holder is effected by power directed by the attendant.

8. The combination, substantially as before set forth, of the shifting tool-holder,link,rocking sleeve, the rock-shaft, and its pins.

4. The combination, substantially as before set forth, of the. rock-shaft with its pins, the shifting hook, the hook-stock to which it is connected pivotally, the cam for moving it so as to operate upon said pins, and the crankpin for moving it up and down.

5. The combination, substantially as before set forth, of the shifting tool-holder with the operating-arm T through the intervention of the rocking crutch and the stop-segment.

In witness whereof I have hereto set my hand this 23d day of February, A. D. 1884.

HENRY JAMES JOHNSON. Witnesses:

GARDNER O. ANTHONY, WALTER F. BROWN. 

